Invention Grant
- Patent Title: Heap/stack guard pages using a wakeup unit
- Patent Title (中): 堆/堆栈保护页面使用唤醒单元
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Application No.: US12696817Application Date: 2010-01-29
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Publication No.: US08713294B2Publication Date: 2014-04-29
- Inventor: Thomas M. Gooding , David L. Satterfield , Burkhard Steinmacher-Burow
- Applicant: Thomas M. Gooding , David L. Satterfield , Burkhard Steinmacher-Burow
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Agent Daniel P. Morris, Esq.
- Main IPC: G06F15/00
- IPC: G06F15/00 ; G06F7/38 ; G06F9/00 ; G06F9/44

Abstract:
A method and system for providing a memory access check on a processor including the steps of detecting accesses to a memory device including level-1 cache using a wakeup unit. The method includes invalidating level-1 cache ranges corresponding to a guard page, and configuring a plurality of wakeup address compare (WAC) registers to allow access to selected WAC registers. The method selects one of the plurality of WAC registers, and sets up a WAC register related to the guard page. The method configures the wakeup unit to interrupt on access of the selected WAC register. The method detects access of the memory device using the wakeup unit when a guard page is violated. The method generates an interrupt to the core using the wakeup unit, and determines the source of the interrupt. The method detects the activated WAC registers assigned to the violated guard page, and initiates a response.
Public/Granted literature
- US20110119445A1 HEAP/STACK GUARD PAGES USING A WAKEUP UNIT Public/Granted day:2011-05-19
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